
body{
	  /* 不变 */
	background:url(../img/登录界面背景.jpg)  no-repeat center center;
	background-size:cover;
	background-attachment:fixed;
	background-color:#CCCCCC;
}

.box {
	width: 550px;
	height: 380px;
	margin: auto;
	
	/* 位于浏览器居中 */
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	
	background-color: rgba(240, 255, 252, 0.7);
	
	/* 设置圆角 */
	border-radius: 30px;
}

.text {
	font-size: 34px;
	text-align: center;
	margin-top: 26px;
}